Amanda Seyfried and Thomas Sadoski Credit: Cousart/JFXimages/WENN.com

Mamma mia! Costars Amanda Seyfried and Thomas Sadoski have recently started dating after reconnecting on the set of their new film, The Last Word, multiple sources exclusively confirm to Us Weekly.

“Amanda and Thomas are definitely dating right now. She’s no longer single,” a source tells Us.

The pair were friends from their time costarring in the off-Broadway show The Way We Get By last year, and things turned romantic when they reunited on set during the last few weeks. They were spotted arriving to work together and playing with Amanda’s dog, Finn, on Thursday, March 3.

Previously the Love the Coopers actress, 30, dated Justin Long for more than two years before they called it quits in late September 2015. Prior to the Frank & Lola actor, she dated Mamma Mia! costar Dominic Cooper from 2008 to 2013. She has also been linked to Dexter actor Desmond Harrington. Sadoski, 39, split from his wife of eight years, Kimberly Hope, in July 2015.

Lucky for the new couple, they get to spend lots of time together on set. Seyfried has discussed the struggle of finding time for a relationship while filming. “Making movies is two solid months of 12-, 14-hour days. I mean, it can ruin your relationship,” she told Vogue in 2015. 

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